When I calculate correctly every person on this world could own 260000 staoshis in average, if all bitcoins were mined and the world population is about 8 billion people.
That does not sounds much at first, but of course a satoshi would be worth much more than today, lets say one dollar.
When a transaction has fees of 10000 satoshis, who would pay that?
Nobody I guess. That's why I say there are way too less satoshis to make bitcoin function as a global currency.
the fees would go down in such a case. maybe even to 1 sat. but there are other problems.
if you assume 1 sat = $1 then we have a problem when buying products cheaper then $1. so lets say 1 sat = $0.01 = 1 cent. this would mean every person would have the equivalent of $2600. and obviously this is not enough, but this will not happen anyway.